hjones, As long as 90% of all trips are over 7 miles, then fewer acids are formed, so less chance for sludge, and longer lasting oil.
Walmart has it for $27 for 5 quart jug, or walmart.com will ship it to you. Good choice on oil, but M1 EP at walmart is priced about the same and likely just as good.
Use a Fram Ultra. Best oil filter from a filtering perspective and rugged construction combined.
I used to have an '04 2.7L V6, loved the way it revs, good for 200 hp. It is not respected much in the engine world though.